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A graphene-supported zirconia composite material, its preparation method and its application as a desulfurization adsorbent

A technology of composite materials and zirconia, applied in chemical instruments and methods, alkali metal compounds, adsorption water/sewage treatment, etc., can solve the problem of limited specific surface area and effective adsorption area of ​​composite materials, easy agglomeration of nano-ions, and poor distribution uniformity and other problems, to achieve the effect of easy regeneration and recycling, large adsorption capacity, and prevention of agglomeration

Active Publication Date: 2019-02-05
郑州丰元冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above-mentioned reduced graphene oxide / nano zirconia composite material has the advantages of stable properties, fast adsorption speed, and recyclable utilization as an adsorption dephosphorization agent, but it is prepared by directly adding graphene oxide with nano zirconia In the solution, nano-ions are easy to agglomerate and not easy to disperse, resulting in poor distribution uniformity of nano-zirconium dioxide on the graphene sheet, resulting in limited specific surface area and effective adsorption area of ​​the composite material, which is used to remove sulfate ions in water ,not effectively

Method used

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  • A graphene-supported zirconia composite material, its preparation method and its application as a desulfurization adsorbent
  • A graphene-supported zirconia composite material, its preparation method and its application as a desulfurization adsorbent
  • A graphene-supported zirconia composite material, its preparation method and its application as a desulfurization adsorbent

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Embodiment 1

[0049] The graphene-supported zirconia composite material of the present embodiment is prepared by the following method:

[0050] 1) Preparation of graphene oxide dispersion:

[0051] a) Add 138ml of concentrated sulfuric acid (mass concentration: 98%) in a 1000ml beaker, place in an ice-water bath, and add 3.0g of NaNO successively under stirring conditions 3 and 3.0 g of graphite powder, continue to stir vigorously for 15 min; slowly add 18.0 g of potassium permanganate, stir for 2 h to react, and obtain mixture A;

[0052] b) Place the beaker containing the obtained mixture A in a constant temperature water bath at 35°C, and after stirring for 1 hour, transfer the beaker to an ice-water bath, add 240ml of deionized water dropwise, and control the temperature of the system below 60°C to obtain mixture B;

[0053] c) Place the beaker containing the obtained mixture B in a 95°C water bath, and stir for 30 minutes; transfer the beaker to room temperature, and add 600ml of deio...

Embodiment 2

[0061] The graphene-supported zirconia composite material of the present embodiment is prepared by the following method:

[0062] 1) Preparation of graphene oxide dispersion:

[0063] a) Under the condition of 0~3℃, 1.0g of NaNO 3 Add 2.0g of graphite powder into 92ml of concentrated sulfuric acid, slowly add 12.0g of potassium permanganate, stir for 2h to react, and obtain mixture A;

[0064] b) Place the beaker containing the obtained mixture A in a constant temperature water bath at 35°C, and after stirring for 1 hour, add 160ml of deionized water dropwise, and control the temperature of the system below 60°C to obtain mixture B;

[0065] c) Place the beaker containing the obtained mixture B in a 98°C water bath, stir for 30 minutes; add 300ml of deionized water to dilute, then add 15ml of hydrogen peroxide dropwise with a mass concentration of 30% and mix it with 5% hydrogen peroxide. Wash with hydrochloric acid and centrifuge 4 times (the rotating speed of each centrifu...

Embodiment 3

[0071] The graphene-supported zirconia composite material of the present embodiment is prepared by the following method:

[0072] 1) Preparation of graphene oxide dispersion:

[0073] a) At 1°C, add 0.25g of NaNO 3 Add 1.0g of graphite powder into 92ml of concentrated sulfuric acid, slowly add 5.0g of potassium permanganate, stir for 2h to react, and obtain mixture A;

[0074] b) Place the beaker containing the obtained mixture A in a constant temperature water bath at 35°C, and after stirring for 1 hour, add 80ml of deionized water dropwise, and control the temperature of the system below 50°C to obtain mixture B;

[0075] c) Place the beaker containing the resulting mixture B in a 97°C water bath, stir for 30 minutes; add 150ml of deionized water to dilute, then add 8ml of hydrogen peroxide dropwise with a mass concentration of 30% and mix it with 5% hydrogen peroxide. Wash with hydrochloric acid and centrifuge 4 times (the rotating speed of pickling is 5000rpm for each ce...

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Abstract

The invention discloses a graphene loaded zirconium oxide composite material, a preparing method thereof, and the application thereof as a desulfurizer adsorbent. The preparing method comprises the steps of 1, mixing graphene oxide dispersion liquid with zirconium oxychloride solution, and then adding sodium hydroxide till pH becomes 8-14, so that a precursor mixture is obtained; 2, conducting hydrothermal reaction of the precursor mixture at 190-210 DEG C for 20-60 min, and then conducting washing and drying to obtain the composite material. Nano-zirconia particles generated through hydrothermal reaction of the composite precursor have a uniform size, the surface of graphene is uniformly loaded with the nano-zirconia particles, agglomeration of nano-zirconia is prevented, the material has a large specific area, and the efficient adsorption property of zirconium oxide is fully utilized; when the composite material serves as the adsorbent to remove sulfate ions in water, adsorption capacity is high, adsorption rate is high, recycling can be achieved easily, economic benefits and environment benefits are high, and application prospects are broad.

Description

technical field [0001] The invention belongs to the technical field of adsorption and purification of water bodies, specifically relates to a graphene-supported zirconia composite material, and also relates to a preparation method of the graphene-supported zirconia composite material and its application as a desulfurization adsorbent. Background technique [0002] With the development of modern industry and economy, the problem of water resources and environmental pollution has become more and more serious, which has seriously restricted the sustainable development of human society. For a long time, water body anion pollution has been paid attention to by people, and sulfate radical is a kind of anion commonly found in wastewater. wastewater), metallurgical industrial wastewater (wastewater and waste acid produced by using sulfuric acid as a solution for leaching or cleaning), food wastewater (use of sulfuric acid in fermentation and its production process), chemical wastewa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/0211B01J20/20B01J20/28057B01J2220/42B01J2220/4806C02F1/281C02F2101/101
Inventor 范冰冰李红霞叶国田张锐李娅娅史春燕杨兵权韩奉奇杨静
Owner 郑州丰元冶金材料有限公司
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